Effects of starting powder on microstructure and thermal conductivity of pressureless-sintered fully ceramic microencapsulated fuels |
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| Affiliation: | 1. Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul, Seoul 02504, Republic of Korea;2. Nuclear Fuel Technology Department, KEPCO Nuclear Fuel, Daejeon 34057, Republic of Korea;1. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China;2. Chongqing Key Laboratory of Nano Micro Composite Materials and Devices, Chongqing 401331, PR China;3. School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China;1. School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China;2. Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;1. Department of Extreme Environmental Coatings, Korea Institute of Materials Science, Changwon, Gyeongnam 51508, Republic of Korea;2. Department of Materials Convergence and System Engineering, Changwon National University, Changwon, Gyeongnam 51140, Republic of Korea;3. Research Center of Modern Surface and Interface Engineering, Anhui University of Technology, Maanshan 243002, China;4. BGRIMM Technology Group, Beijing 100160, China;1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063007, China;3. School of Physics and Electronic Information, Yan''an University, Yanan 716000, China;1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;2. Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China;3. Drilling Technology Division, Exploration and Petroleum Engineering Center-Advanced Research Center (EXPEC ARC), Saudi Aramco, Dhahran 31311, Saudi Arabia;4. Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;5. Chongqing Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM), School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China;6. Academy for Advanced Interdisciplinary Studies and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China |
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| Abstract: | The effects of the starting SiC powder (α or β) with the addition of 5.67 wt% AlN–Y2O3–CeO2–MgO additives on the residual porosity and thermal conductivity of fully ceramic microencapsulated (FCM) fuels were investigated. FCM fuels containing ～41 vol% and ～37 vol% tristructural isotropic (TRISO) particles could be sintered at 1870 °C using α-SiC and β-SiC powders, respectively, via a pressureless sintering route. The residual porosities of the SiC matrices in the FCM fuels prepared using the α-SiC and β-SiC powders were 1.1% and 2.3%, respectively. The thermal conductivities of FCM pellets with ～41 vol% and ～37 vol% TRISO particles (prepared using the α-SiC and β-SiC powders, respectively) were 59 and 41 Wm?1K?1, respectively. The lower porosity and higher thermal conductivity of FCM fuels prepared using the α-SiC powder were attributed to the higher sinterability of the α-SiC powder than that of the β-SiC powder. |
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| Keywords: | Silicon carbide Fully ceramic microencapsulated fuels Starting SiC powder Residual porosity Thermal conductivity |
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